Pipe-coupling.



Patented D6029, 1914.

PIPE COUPLING.

G. H. COBB & A. DRUMTRA.

APPLICATION FILED 00T.16.1912.

' purposes.

onrrnn sratrns PATENT OFFICE,

, se ms s 9 e AM na es as answerer NEW ms PIPE-COUPLING.

Application-filed October 16,

.the county of Broome and State of New York, have invented acertain new and use ful Improvement in Pipe-Couplings,' of V which the following is a specification.

This invention relates to pipe couplings, and particularly to devices of this character having bolted or otherwise secured flange, sections and adapted to reunite the ends of a pipe line where the same has been out for the purpose of renewing a defective section or for inserting a T connection or for other Our improvement is especially designed 'for pipe lines laid in the ground, but may also be used for coupling pipe lines in buildings or elsewhere. Where it is necessary to repair a pipe line laid in the ground, either for removing a split section or for inserting a valve or a branch line connection, it is the practice, where a bolted flange joint is to be-inserted, to dig up a suflicient length of the pipe lineto sprin the adjacent pipe ends out of line with eac 1 other while the flanges are put on, and then bring the sections in line and bolt the flanges together. This requires a great amount of labor and.time in excavating and filling in such a long trench, nearly all of which work may be saved by means of our improvement with which it is only necessary to uncover the defective pipe section or that portion which is to be removed.

In the accompanying drawing, the-figure illustrates in central longitudinal section, one form of pipe coupling embodying our improvement,

According to the construction shown, we provide two flanges, 4 and 5, adapted to be bolted or otherwise secured together, and having inside threaded portions for connection with a pipe section, 1, and a nipple section, 6, respectively. One end of the nipple may be externa 1y threaded as at 9 to fit the usual collar, 3, on pipe section, 2, while the other end is enlarged at 7, and provided with a threaded connection, 8, fitting the threaded portion of the flange, 5, the thread tapering toward the small end of the nipple,

so that the flange may be slipped over the smaller portion of the nipple and then screwed up tight on its enlarged end. For this purpose, the interior of one or both of the flanges, 4 and 5, are counter-bored as at Specification of Letters Batent.

Patented-Dec. 29, 1914a 1912. Serial u wagons 10, to form a recess within which the en larged end, 7, of the nip le, 6, may extend when the small end of the nipple is being inserted into the collar at the threaded end, 9. The threaded connections, 8 and 9, at opposite ends of the nipple are preferably made of the same gage and direction so that both threads may be screwed up at the same time if desired. One of the flanges may also be provided with 'a circular rib, 11, engaging a corresponding recess and gasket, 12, in the other flange when the same are tightly clamped together by means of the bolts, 13.

When a buried pipe line is to be repaired or cut for any purpose, the portion to be re moved is uncovered, and the defective or the required length of pipe is cut out. If .the pro1ectin ends of the pipe line are then without t readed connections, be out upon these ends with the usual tools, and a collar screwed upon one of them. The annular flange 4, of our improved coupling, having a regular threaded connection, may then be screwed tightly upon the end of the other pipe section Where there is no collar. The other flange, 5, with the nipple screwed into place therein is then-temporarily bolted to the fixed flange, 4, in order-totake a. measurement for the length of pipe, 2, necessary to close the gap from the nipple to the end of the ipe carrying the collar (not shown). The ange, 5, and ni ple are then removed, and the pipe, 2, o the desired length, with collar, 3, on the end toward the nipple, is screwed into place in the other collar. This leaves the coupling to be completed with the flange, 5, and nipple, 6, which is then readil done by sliding the flange onto the nipple over the small end, and inserting the enlarged end, 7 of the nipple into the recess, 10, within the flanges a sufficient distance to allow the end threaded at 9 to enter the collar, 3. The threads, 9 and 8, may then be screwed up together or the thread, 9, may first be screwed up tight and the flange, 5, then turned up on thread,

threads may out inserting an additional measured length of pipe. Itwill also be apparent that the flange 4, is not necessarily a separate flange, as it may be other fitting having a flanged end.

It will now be seen that our improved coupling is of a simple and durable construction which may readily be inserted to reunite the ends of a pipe line where a out has been made for any reason, or where it is necessary to' replace a defective section.

Having now-described our invention, what we claim as new and desire to secure by Letters Patent is:

In a pipe coupling, the combination of a flange member having a pipe connection, another independently rotatable flange memthe flange of a valve, T, L, or

her having a threaded opening, a detach able nipple having an enlarged threaded end GEORGE H. COBB. ADAM DRUMTRA.

Witnesses: H. R. Rows,

A E. RAPP.

with a thread of the- 

